Initial cloud-services repo - gateway service + pkg modules

pkg/common/car_data.go

@@ -0,0 +1,76 @@
+package common
+
+import (
+	"encoding/json"
+
+	"fiskerinc.com/modules/grpc/kafka_grpc"
+	"github.com/pkg/errors"
+)
+
+type CANBusFrame struct {
+	EpochUsec int64  `json:"epoch_usec"`
+	ID        int    `json:"id"`
+	Data      string `json:"data"`
+}
+type CANBusMessageRaw struct {
+	EpochUsec int64         `json:"epoch_usec"`
+	Dropped   int           `json:"dropped"`
+	Filtered  int           `json:"filtered"`
+	Frames    []CANBusFrame `json:"frames"`
+}
+type CarDataBatchPayloadRaw struct {
+	Handler string           `json:"handler"`
+	Data    CANBusMessageRaw `json:"data"`
+	Version string           `json:"version"`
+}
+
+// CarDataBatchPayload is a payload received from T.Rex
+//
+//	it contains batches of CANMessages (can.go)
+type CarDataBatchPayload struct {
+	Handler string        `json:"handler"`
+	Data    CANBusMessage `json:"data"`
+	Version string        `json:"version"`
+}
+
+func (c *CarDataBatchPayload) Marshal() ([]byte, error) {
+	data, err := json.Marshal(*c)
+	return data, errors.WithStack(err)
+
+}
+
+func (c *CarDataBatchPayload) Unmarshal(data []byte) error {
+	err := json.Unmarshal(data, c)
+	return errors.WithStack(err)
+}
+
+func (c *CarDataBatchPayload) ToGrpc(data MessageRawJSON, vin string) (*kafka_grpc.GRPC_BatchPayload, error) {
+	var payload CANBusMessageRaw
+	err := json.Unmarshal(data.Data, &payload)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	frames := make([]*kafka_grpc.GRPC_CANFrame, len(payload.Frames))
+	msg := kafka_grpc.GRPC_CANData{
+		EpochUsec: payload.EpochUsec,
+		Dropped:   int32(payload.Dropped),
+		Filtered:  int32(payload.Filtered),
+		Frames:    frames,
+		Vin:       vin,
+	}
+
+	for i, frame := range payload.Frames {
+		msg.Frames[i] = &kafka_grpc.GRPC_CANFrame{
+			Epoch: frame.EpochUsec,
+			ID:    int32(frame.ID),
+			Value: []byte(frame.Data),
+		}
+	}
+	batch_payload := kafka_grpc.GRPC_BatchPayload{
+		Handler: data.Handler,
+		Data:    &msg,
+		Version: data.Version,
+	}
+	return &batch_payload, nil
+}